import java.util.Scanner;
public class Example2_3{
	public static void main(String args[]){
		System.out.println("请输入若干个数，每输入一个数回车确认");
		System.out.println("最后输入数字0结束操作");
		Scanner reader = new Scanner(System.in);
		double sum=0;
		double x = reader.nextDouble();
		while(x!=0){
			sum =sum +x;
			x=reader.nextDouble();
		}
		System.out.println("sum="+sum);
	}
}
